缪彦,马英强,廖张妍,印万忠.铜蓝浸出化学动力学研究[J].有色金属(冶炼部分),2019(2):1-5.
铜蓝浸出化学动力学研究
Study on Chemical Leaching Kinetics of Covellite
投稿时间:2018-10-29  修订日期:2018-10-30
DOI:doi:10.3969/j.issn.1007-7545.2019.02.001
中文关键词:  蓝辉铜矿  铜蓝  化学浸出  动力学
英文关键词:chalcocite  covellite  chemical leaching  kinetics
基金项目:国家杰出青年科学基金项目(51804081)
           
作者单位
缪彦 福州大学紫金矿业学院
马英强 福州大学紫金矿业学院
廖张妍 福州外语外贸学院
印万忠 福州大学紫金矿业学院
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中文摘要:
      模拟生物堆浸工艺条件,在硫酸铁酸性介质体系下,针对浸出温度、氧化还原电位和pH进行铜蓝化学浸出动力学试验研究。结果表明,硫酸铁酸性浸出铜蓝符合典型的缩核模型,速率受表面化学反应控制,而非扩散控制,表观活化能48.94 kJ/mol。铜蓝的浸出率与温度和氧化还原电位呈正相关,pH对铜蓝浸出的影响微弱。在初始Fe3+浓度9.2 g/L、Fe2+浓度3.0 g/L、初始pH=1.00±0.05、氧化还原电位恒定在(720±10)mV(vs. SHE)、40 ℃条件下浸出288 h,铜蓝的浸出率达到42.17%。
英文摘要:
      Through simulating technological conditions of heap bioleaching, chemical leaching kinetics of covellite was studied in acidic medium system of ferric sulfate in terms of leaching temperature, redox potential (ORP) and pH value. The results show that acid leaching of covellite by ferric sulfate conforms to typical shrinkage nucleation model with apparent activation energy of 48.94 kJ/mol, and leaching rate is controlled by surface chemical reaction rather than diffusion. Leaching rate of covellite is positively correlated with temperature and ORP, while pH value has weak influence on leaching of covellite. Leaching rate of covellite is 42.17% under the conditions including initial Fe3+ concentration of 9.2 g/L, Fe2+ concentration of 3.0 g/L, initial pH=1.00±0.05, ORP of (720±10)mV (vs. SHE), temperature of 40 ℃, and leaching time of 288 h.
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